Feeling sick in 3rd trimester?

I'm 32 weeks and 6 days and for the past couple of days I've felt sick. Almost like car sick and it won't go away. I've been going to the bathroom a lot and it's been diarrhea (sorry I know TMI). Feeling nauseous every now and then but haven't thrown up. I feel very drained and I've been having cramps that feel like period cramps. I notice that when Im eating I have to get up half the time through my meal and go to the bathroom. Anyone else having similar symptoms? What can I do or take to help this?